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New route to improve the fracture toughness and flexural strength of Si3N4ceramics by adding FeSi2
Wang, Lujie1,2; Qi, Qian1; Cai, Ping1; Zhang, Hui1; Yang, Xiao1; Liu, Xuejian1; Jiao, Zheng2; Huang, Zhengren1
2017
Source PublicationScripta Materialia
ISSN13596462
Volume126Pages:11-14
AbstractSilicon nitride (Si3N4) ceramics were pressureless sintered with 0.2 wt% FeSi2at 1780 °C for 2 h in nitrogen with Al2O3and Y2O3as sintering aids and found to have high toughness and strength. During the sintering process, β-Si3N4crystal seeds and Fe5Si3reinforcing particles were in situ generated by FeSi2. Abnormal growth of Si3N4grains was promoted by β-Si3N4crystal seeds. High thermal expansion coefficient of Fe5Si3particles induced residual stresses in the ceramics matrix, which deflected the crack. Ultimately, the fracture toughness and flexural strength of Si3N4ceramics reached 9.8 ± 0.5 MPa·m1/2and 1086 ± 48 MPa respectively. © 2016 Acta Materialia Inc.
DOI10.1016/j.scriptamat.2016.08.012
EI Accession Number20163402730313
EI KeywordsFracture toughness
EI Classification Number804 Chemical Products Generally - 804.2 Inorganic Compounds - 812.1 Ceramics - 951 Materials Science
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25927
Collection中国科学院上海硅酸盐研究所
Affiliation1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai; 200050, China;
2.College of Environmental and Chemical Engineering, Shanghai University, Shanghai; 200444, China
Recommended Citation
GB/T 7714
Wang, Lujie,Qi, Qian,Cai, Ping,et al. New route to improve the fracture toughness and flexural strength of Si3N4ceramics by adding FeSi2[J]. Scripta Materialia,2017,126:11-14.
APA Wang, Lujie.,Qi, Qian.,Cai, Ping.,Zhang, Hui.,Yang, Xiao.,...&Huang, Zhengren.(2017).New route to improve the fracture toughness and flexural strength of Si3N4ceramics by adding FeSi2.Scripta Materialia,126,11-14.
MLA Wang, Lujie,et al."New route to improve the fracture toughness and flexural strength of Si3N4ceramics by adding FeSi2".Scripta Materialia 126(2017):11-14.
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